My wife and I were in the shower together and I accidentally entered her anus. It was not intentional at all and I removed it straight away and we did not repeat the act. Our niyyat was pure so are we accountable for this; should we make tawbah for the accident but it is still a big ghuna or not so in this case? Jazak-Allah.
You should repent for this and never repeat that in future. Also, avoid such circumstances that will lead you to such an accident.
and Allah Ta’ala Knows Best
Mufti Ebrahim Desai